Bubble Train is the perfect example, because it is a version of the popular Zuma game, with some changes applied to the game modes and even including a level editor so that we can make the game as difficult or easy as we want.
Like in the original game, the objective is to eliminate all the balls, by firing balls from a cannon that is at the bottom of the screen, trying to make groups of three or more balls of the same color before they reach the end of the path. We will have a choice of different difficulty levels from which to start playing, so that people that have played Zuma or similar games can start at a higher level.
When we speak about the graphics, we must say that both the animations and the design are simple and poor, but we can also say that they don't affect the playability.
If you want a totally free clone of Zuma, with which you will be able to create your own levels, download Bubble Train right now.